By: |
Costola, Michele;
Nofer, Michael;
Hinz, Oliver;
Pelizzon, Loriana |
Abstract: |
The possibility to investigate the impact of news on stock prices has observed
a strong evolution thanks to the recent use of natural language processing
(NLP) in finance and economics. In this paper, we investigate COVID-19 news,
elaborated with the "Natural Language Toolkit" that uses machine learning
models to extract the news' sentiment. We consider the period from January
till June 2020 and analyze 203,886 online articles that deal with the pandemic
and that were published on three platforms: MarketWatch.com, Reuters.com and
NYtimes.com. Our findings show that there is a significant and positive
relationship between sentiment score and market returns. This result indicates
that an increase (decrease) in the sentiment score implies a rise in positive
(negative) news and corresponds to positive (negative) market returns. We also
find that the variance of the sentiments and the volume of the news sources
for Reuters and MarketWatch, respectively, are negatively associated to market
returns indicating that an increase of the uncertainty of the sentiment and an
increase in the arrival of news have an adverse impact on the stock market. |
Keywords: |
COVID-19 news,Sentiment Analysis,Stock Markets |
JEL: |
G10 G14 G15 |
Date: |
2020 |
URL: |
http://d.repec.org/n?u=RePEc:zbw:safewp:288&r=all |